Attachment for printing presses



Ma a, 1924 5 1393.156

A. J. KECK ATTACHMENT FOR PRINTING PRESSES I Filed July 10 \922QKWEZEMEMEIZIEIZIIZMEIPZ INVEN TOR A47 KECK. BY M M A TTQRNEIYb ALBERTJ. KECK, or s1. PAUL, MINNEsoTA. q

ATTACHMENT FOE PRINTING PRESSES.

Application filed July 10, 1922. Serial No. 573,792.

To all whom it may concem:

Be it known that I, ALBERT J. Knox, a citizen of the United States,residing at St. Paul, in the county of Ramsey and State of Minnesota,have invented certain new and useful Improvements in Attachments forPrinting Presses, of which the following is a specification.

My invention relates to attachments for printing presses, and an objectis to provide an attachment which may be used to spray different colorson newspapers or other printed matter in addition to the usual lettersproduced on the printed matter while passing through the press. Myinvention may be employed to produce attractive borders on the printedmatter or to tint the printed newspaper with any desired color in thenature of a background, or to produce certain letters in color so as tomake an attractive display of a firm name or headline, and it may bealso used to color the letters after they have been printed on the paperwith ink by the customary printing roller.

The full objects of my invention will appear in connectionwith thedetailed description, and the novel features embodied in my inventiveidea will be particularly pointed out in the claims.

In the accompanying drawings which illustrate one form in which theinvention may be employed, Fig. 1 is a viewin longitudinal sectionshowing the attachment ap plied to a printing roller. Fig. 2 is a Viewin section on theline 2--2 of Fig. 1. Fig. 3 is a view in section online 33 of Fig. 1. Fig. 4 is a View in section on the line 4-4 ofFig. 1. Fig. 5 is an elevational view of the attachment.

In the invention as shown in. the drawings, a printing roller 41 isprovided with a separate plate 42 having thereon the desired name orheadline, the letters of which are provided with perforations 44. Acasing 46 is secured to the side of the hollow roller 41 and this casingextends into the roller and has its inner end closed. The portion ofthis casing underneath the plate 42 is provided with a plurality ofperforations 48 and the outer portion of the casing is flared outwardlyto constitute a Venturi tube 50. A slot or opening 52 extends throughthe side wall of the printing roller and leads into the Venturi tube 50.A pipe 54 secured to the frame of the press has its end formed to make atight joint against the outer surface of the side wall of the printingroller as shown in Fig. 3 and while fitting tightly against the sidewall does not prevent rotation of the roller. When the plate 42 comesinto engagement with the impression roller, the opening 52 on account ofrotation of the printing roller comes into registry with the pipe 54,thus providing a passageway into the Venturi tube 50 and printingsurface, means for causing coloring material to be discharged from theinterior of said roller through said perforations when said roller is inprinting position, and means for cutting off the supply of coloringmaterial for the other positions of said roller.

2. In a printing press, the combination of a printing roller havingperforations in its printing surface, means for causing coloringmaterial to be discharged from the interior of said roller through saidperforations when said roller is in printing position, and meanscontrolled by the rotation of said roller for cutting off the supply ofcoloring material for the other positions of said roller.

3. In a printing press, the combination of a printing roller havingperforations in its printing surface, one end of said roller having anopening leading to the interior of the roller, and a pipe for supplyingcoloring material under pressure, the inner end of said pipe fittingtightly against said end of the roller and registering with said openingwhen the roller is in printing position.

4. In a printing press, the combination of a printing roller havingperforations in its printing surface, a tube secured within the interiorof said roller, said tube having perforations adapted to dischargetoward the perforations in the printing surface and vone end of saidroller having an opening 5 leading into said tube, and a pipe forsupplying coloring material under pressure, the inner end of said pipefitting tightly against said end of the roller and registering With saidopening when the roller is in printing position. y

In testimony whereof I hereunto aflix my signature.

ALBERT VJ. KECK.

